Non-spectral interferences due to the presence of sulfuric acid in inductively coupled plasma mass spectrometry

García-Poyo, M. Carmen; Grindlay, Guillermo; Gras, Luis; Loos-Vollebregt, M.T.C. de; Mora, Juan

doi:10.1016/j.sab.2014.11.003

Cited by 16 publications

(34 citation statements)

References 28 publications

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“…minimum energy defect of the reaction and conservation of the electron spin) and, as a consequence, non-argon based charge transfer reactions only affect certain elements [11,12]. It was found that As, P, Se and Te signals in ICP-MS are selectively enhanced by carbon and sulfur-based charge transfer reactions whereas Au, Hg, I, and Sb are only enhanced by carbon.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…It is well-known that sulfuric and phosphoric acid solutions afford lower analyte transport rate values when compared to nitric acid solutions and, hence, lower signals are expected for these matrices [12,26]. Plasma energetic characteristics were not significantly modified by sulfur and phosphorus when compared to 1% w w -1 nitric acid solution.…”

mentioning

confidence: 94%

“…In a recently published systematic study of non-spectral interferences in ICP-MS due to the presence of sulfuric acid, Garcia-Poyo et al [12] demonstrated that As, P, Se and Te ionization is significantly enhanced by sulfur-based charge transfer reactions. To better understand sulfur and phosphorus-based charge transfer reactions in ICP-based techniques and to complete our previous study [12], additional experiments were carried out in ICP-MS. First, it was investigated whether I is affected by sulfur-based charge transfer reactions since this element was not included in the work of Garcia-Poyo et al [12]. Second, the potential influence of phosphorus on the ion signals of Ag, Al, As, Au, B, Ba, Be, Cd, Co, Cr, Cu, Fe, Ga, Hg, In, Ir, Li, Mn, Ni, P, Pb, Pd, Pt, S, Sb, Se, Sr, Te and Zn was also investigated.…”

mentioning

confidence: 99%

“…Instrumentation and operating conditions for these experiments were similar to those described elsewhere [12]. Signals obtained in ICP-MS for 20 g L -1 sulfur and phosphorus solutions were compared to the corresponding signals in nitric acid 1% w w -1 solution.…”

mentioning

confidence: 99%

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Carbon-, sulfur-, and phosphorus-based charge transfer reactions in inductively coupled plasma–atomic emission spectrometry

Grindlay

Gras

Mora

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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In this work, the influence of carbon, sulfur and phosphorus-based charge transfer reactions on the emission signal of 34 elements (Ag, Al, As, Au, B, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, Ga, Hg, I, In, Ir, K, Li, Mg, Mn, Na, Ni, P, Pb, Pd, Pt, S, Sb, Se, Sr, Te and Zn) in axially-viewed inductively coupled plasma-atomic emission spectrometry has been investigated. To this end, atomic and ionic emission signals for diluted glycerol, sulfuric acid and phosphoric acid solutions were registered and results were compared to those obtained for a 1% w w -1 nitric acid solution.Experimental results show that the emission intensities of As, Se and Te atomic lines are enhanced by charge transfer from carbon, sulfur and phosphorus ions. Iodine and P atomic emission is enhanced by carbon and sulfur-based charge transfer whereas the Hg atomic emission signal is enhanced only by carbon. Though signal enhancement due to charge transfer reactions is also expected for ionic emission lines of the above mentioned elements, no experimental evidence has been found with the exception of Hg ionic lines operating carbon solutions. The effect of carbon, sulfur and phosphorus charge transfer reactions on atomic emission depends on: (i) wavelength characteristics. In general, signal enhancement is more pronounced for electronic transitions involving the highest upper energy levels; (ii) plasma experimental conditions. The use of robust conditions (i.e. high r.f power and lower nebulizer gas flow rates) improves carbon, sulfur and phosphorus ionization in the plasma and, hence,

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Section: Accepted M Manuscriptmentioning

confidence: 99%

mentioning

confidence: 94%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Carbon-, sulfur-, and phosphorus-based charge transfer reactions in inductively coupled plasma–atomic emission spectrometry

Grindlay

Gras

Mora

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…Such interferences may result from doublecharged or cluster ions. The former only slightly but the latter strongly depend on the plasma parameters [19,[21][22][23] …”

Section: Principles Of Analysis By Icp-msmentioning

confidence: 99%

Quantitative aspects of inductively coupled plasma mass spectrometry

Bulska¹,

Wagner²

2016

Phil. Trans. R. Soc. A.

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Accurate determination of elements in various kinds of samples is essential for many areas, including environmental science, medicine, as well as industry. Inductively coupled plasma mass spectrometry (ICP-MS) is a powerful tool enabling multi-elemental analysis of numerous matrices with high sensitivity and good precision. Various calibration approaches can be used to perform accurate quantitative measurements by ICP-MS. They include the use of pure standards, matrix-matched standards, or relevant certified reference materials, assuring traceability of the reported results. This review critically evaluates the advantages and limitations of different calibration approaches, which are used in quantitative analyses by ICP-MS. Examples of such analyses are provided. This article is part of the themed issue ‘Quantitative mass spectrometry’.

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Multi-isotope calibration for inductively coupled plasma mass spectrometry

2017

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Multi-isotope calibration (MICal) is a novel approach to calibration for inductively coupled plasma mass spectrometry (ICP-MS). In MICal, only two calibration solutions are required: solution A, composed of 50% v v of sample and 50% v v of a standard solution containing the analytes, and solution B, composed of 50% v v of sample and 50% v v of a blank solution. MICal is based on monitoring the signal intensities of several isotopes of the same analyte in solutions A and B. By plotting the analytical signals from solution A in the x-axis, and from solution B in the y-axis, the analyte concentration in the sample is calculated using the slope of that graph and the concentration of the reference standard added to solution A. As both solutions contain the same amount of sample, matrix-matching is easily achieved. In this proof-of-concept study, MICal was applied to the determination of Ba, Cd, Se, Sn, and Zn in seven certified reference materials with different matrices (e.g., plant materials, flours, and water). In most cases, MICal results presented no statistical difference from the certified values at a 95% confidence level. The new strategy was also compared with traditional calibration methods such as external calibration, internal standardization and standard additions, and recoveries were generally better for MICal. This is a simple, accurate, and fast alternative method for matrix-matching calibration in ICP-MS. Graphical abstract Multi-isotope calibration: fast and innovative matrix-matching calibration for ICP-MS.

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Non-spectral interferences due to the presence of sulfuric acid in inductively coupled plasma mass spectrometry

Abstract: Results of a systematic study concerning non-spectral interferences from sulfuric acid containing matrices on a large number of elements in inductively coupled plasma -mass spectrometry (ICP-MS)

Cited by 16 publications

References 28 publications

Carbon-, sulfur-, and phosphorus-based charge transfer reactions in inductively coupled plasma–atomic emission spectrometry

Carbon-, sulfur-, and phosphorus-based charge transfer reactions in inductively coupled plasma–atomic emission spectrometry

Quantitative aspects of inductively coupled plasma mass spectrometry

Multi-isotope calibration for inductively coupled plasma mass spectrometry

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